fix: Update to MorphoCloud/MorphoCloudWorkflow@dc8407c

List of MorphoCloudWorkflow changes:

```
$ git shortlog ee71e4f..dc8407c --no-merges
Jean-Christophe Fillion-Robin (1):
      fix(request-initial-comments): Add missing line when appending volume and instance names
```

See MorphoCloud/MorphoCloudWorkflow@ee71e4f...dc8407c

.github/workflows/request-initial-comments.yml

@@ -43,6 +43,7 @@ jobs:
         with:
           issue-number: ${{ steps.collect_inputs.outputs.issue_number }}
           body: |
+
             ### Instance Name
 
             `${{ steps.define.outputs.instance_name }}`
@@ -63,6 +64,7 @@ jobs:
         with:
           issue-number: ${{ steps.collect_inputs.outputs.issue_number }}
           body: |
+
             ### Volume Name
 
             `${{ steps.define_volume_name.outputs.volume_name }}`